I have a 94, 1500, 5.7 with 230,000km. Two years ago I could hardly pull my 5th wheel travel trailer up a hill without the motor making strange noises. Local mechanic changed torque converter and replaced the oil pump with a larger one. Ran okay for the rest of the summer. I parked it for the winter. Next summer seemed to be fine till I hooked up the trailer. Then it seemed to be without power. Mechanics on the road changed fuel filter, the catalyitic converter, muffler; when problem still persisted, another shop changed the spark plugs, wiring, distributor cap; when probelm still got worse, a GM shop diagnosed it as a timing issue and readjusted the timing. Then it worked fine for the summer. Parked it again for winter, but this spring it had the same problem - no power pulling a load uphill - flat out it could only go 20 kmh. Engine revs up, right up to redline in the lower gears, but no speed.
Aug 7, 2007 at 12:22 AM